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SIMULATION OF SLIDING WINDOW PROTOCOLS USING C


SENDER
#include<sys/socket.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<netdb.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<unistd.h>
#include<errno.h>
int main()
{
int sock,bytes_received,connected,true=1,i=1,s,f=0,sin_size;
char send_data[1024],data[1024],c,fr[30]=" ";
struct sockaddr_in server_addr,client_addr;
if((sock=socket(AF_INET,SOCK_STREAM,0))==-1)
{
perror("Socket not created");
exit(1);
}
if(setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(int))==-1)
{
perror("Setsockopt");
exit(1);
}
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(17000);
server_addr.sin_addr.s_addr=INADDR_ANY;
if(bind(sock,(struct sockaddr *)&server_addr,sizeof(struct sockaddr))==-1)
{
perror("Unable to bind");
exit(1);
}
if(listen(sock,5)==-1)
{
perror("Listen");
exit(1);
}
fflush(stdout);
sin_size=sizeof(struct sockaddr_in);
connected=accept(sock,(struct sockaddr *)&client_addr,&sin_size);
while(strcmp(fr,"exit")!=0)
{
printf("Enter Data Frame %d:(Enter exit for End): ",i);
scanf("%s",fr);
send(connected,fr,strlen(fr),0);
recv(sock,data,1024,0);
if(strlen(data)!=0)
printf("I got an acknowledgement : %s\n",data);
fflush(stdout);
i++;
}
close(sock);
return (0);
}












RECEIVER
#include<sys/socket.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<netdb.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<unistd.h>
#include<errno.h>
int main()
{
int sock,bytes_received,i=1;
char receive[30];
struct hostent *host;
struct sockaddr_in server_addr;
host=gethostbyname("127.0.0.1");
if((sock=socket(AF_INET,SOCK_STREAM,0))==-1)
{
perror("Socket not created");
exit(1);
}
printf("Socket created");
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(17000);
server_addr.sin_addr=*((struct in_addr *)host->h_addr);
bzero(&(server_addr.sin_zero),8);
if(connect(sock,(struct sockaddr *)&server_addr,sizeof(struct sockaddr))==-1)
{
perror("Connect");
exit(1);
}
while(1)
{
bytes_received=recv(sock,receive,20,0);
receive[bytes_received]='\0';
if(strcmp(receive,"exit")==0||strcmp(receive,"exit")==0)
{
close(sock);
break;
}
else
{
if(strlen(receive)<10)
{
printf("\n Frame %d data %s received\n",i,receive);
send(0,receive,strlen(receive),0);
}
else
{
send(0,"negative",10,0);
}
i++;
}
}
close(sock);
return(0);
}









OUTPUT
SENDER
$ cc sender.c
$ ./a.out
Enter Data Frame 1:(Enter exit for End): saveetha
Enter Data Frame 2:(Enter exit for End): mca
Enter Data Frame 3:(Enter exit for End): exit
$

RECEIVER
$ cc receiver.c
$ ./a.out
Socket created
Frame 1 data saveetha received
Frame 2 data mca received
$

Labels:

Comments

  1. Unknown18 September 2014 at 09:58

    Can anyone tell me please algorithm

    ReplyDelete
  2. Unknown30 November 2014 at 08:44

    Please specify which is the algorithm.
    Stop and Wait, Go Back N or Selective repeat

    ReplyDelete
  3. ABC9 September 2016 at 10:21

    I think this is the Sliding Window Algorithm.

    ReplyDelete
  4. Yedhu130610 April 2019 at 21:07

    Nice one :)

    ReplyDelete
  5. Suraj Mahor22 May 2023 at 03:23

    "I can't thank you enough for sharing such an insightful and well-written blog post. The information provided was well-researched, and the writing style was engaging. I truly appreciate the effort you put into creating this valuable content."

    University For MCA in Delhi NCR

    ReplyDelete

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